The first coupling term which corresponds to a transverse quench was studied in [1]} and the
second one, corresponding to an anisotropic quench was elaborated upon in [2]}.
Here, \(c_1, c_2=0,1\)  correspond to turning the coupling(s) off or on respectively, and we have taken the same interaction
strength \(\delta \) , which simplifies the computations considerably while bringing out the essential physics.
